Tait TM8000 Series

112 Servicing Procedure TM8100 Mobile Radio Service Manual
May 2004 © Tait Electronics Limited
PROGRAMMING FAULTS
1. Initial checks
(1) If the radio’s programming file cannot be read, check the connections between the test
PC and the radio, the cables, the test unit, and that the serial port of the test PC is
correct. (It is good practice to set the
MODE switch on the test unit to “RX”.) Rectify any
fault.
(2) Check if the programming file can be read.
(3) If the file can be read, return to Step 4 of Task 2. If it cannot be read, go to (4) below.
(4) Detach the control head as in Subsection 6.1 (on page 127), and exchange it for a
serviceable spare control head.
(5) Check if the programming file can be read.
(6) If the file can be read, the original control head is faulty; disconnect the spare control
head, and go to Part 2 below. If the file still cannot be read, the radio body is faulty;
reconnect the original control head, and go to Part 3.
2. Control head faulty
(1) If the control-head loom has already been checked, go to (5). If it has not, exchange
the loom for a serviceable spare loom.
(2) Check if the programming file can be read.
(3) If the file can be read, the original loom is faulty; go to (4). If the file still cannot be
read, reconnect the original loom, and go to (5).
(4) Replace the faulty control-head loom, and return to Step 4 of Task 2.
(5) Check the control-head connector and microphone connector on the control-head
board and the path between them.
(6) If either connector is faulty, remove the control-head board as in Subsection 6.2
(on page 131), and replace the connector. If there is an obvious fault causing a break
in the path between the connectors, repair it. If no fault can be found, replace the
control-head board as in Subsection 7.4 (on page 163).
(7) Check if the programming file can be read.
(8) If the file can be read, return to Step 4 of Task 2. If the file cannot be read, re-assemble
the control head with the original control-head board, and return to Step 4 of Task 2.
3. Radio body faulty
(1) Remove the lid of the radio body as in Subsection 6.3 (on page 137).
(2) Repair or replace the main-board assembly as in Section 8 (on page 165).
(3) The final test in Section 8 will indicate whether the repair succeeded or failed. Return
to Step 4 of Task 2.
Figure 5.2 Chart for locating and rectifying faults that affect the reading of the programming file